可充电锌-空气电池中双功能氧电催化剂真活性相的解析：以CoMoO4为例

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-09-25 DOI:10.1063/5.0293300

Hongru Hao, Jiahui Wang, Jian Zhou, Lingling Xu, Zhe Lv, Bo Wei

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引用次数: 0

摘要

高效的双功能氧电催化是可充电金属-空气电池的必要条件；然而，它们在实际运行条件下的实际活动阶段在很大程度上仍未被探索。本研究以CoMoO4为模型电极，通过原位拉曼光谱和电化学分析阐明了析氧反应（OER）和氧还原反应（ORR）过程中的表面重构。我们的研究结果表明，原位生成的CoO2是OER的主要活性相，而β-CoOOH主导ORR过程。密度泛函理论计算进一步证实，这些相的形成优化了电子结构，降低了反应能垒。组装锌-空气电池可提供138.3 mW cm - 2的最大功率密度，并可进行320小时的长周期循环测试。这项工作为设计高效氧电催化剂提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Deciphering the true active phases of bifunctional oxygen electrocatalyst in rechargeable zinc–air batteries: A case study of CoMoO4

Efficient bifunctional oxygen electrocatalysis is essential for rechargeable metal–air batteries; however, their real active phases under operational conditions remain largely unexplored. In this study, using CoMoO4 as a model electrode, the surface reconstructions during the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are elucidated through in situ Raman spectroscopy and electrochemical analyses. Our results reveal that the in situ generated CoO2 acts as the primary active phase for OER, while β-CoOOH dominates the ORR process. Density functional theory calculations further confirm that the formation of these phases optimizes the electronic structure and reduces reaction energy barriers. An assembled zinc–air battery delivers a maximum power density of 138.3 mW cm−2 with an excellent long-period cycling test for 320 h. This work offers valuable insights for the design of efficient oxygen electrocatalysts.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.